| 摘要 |
<p>The invention relates to a data transmission method in a wireless data transmission system where signals with one or more data rates and quality levels are transmitted simultaneously. In order for it to be possible to transmit information on the radio path at different rates and quality requirements, the transmitter according to the invention comprises means (206, 208) for carrying out outer coding for at least some of the signals to be transmitted so that all the signals to be transmitted have a common quality level, means (214) for combining the signals to be transmitted into frames having a given length, means (220) for carrying out inner coding for the frames to be transmitted, and means (222) for repeating or deleting symbols in each frame, if necessary, so that the length of the symbols or each frame equals that of a multifold of a time interval that is known and essentially shorter than the symbol length. The transmitter according to the invention further comprises means (254) for adjusting the transmitting power used during transmission of each frame proportionally to the number of symbols each frame had prior to symbol repetition.</p> |
